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The diorganotin(IV) compound Ph2Sn(S2CNMe2)(NCS) (3) was obtained by reacting either Ph2Sn(SCN)2 (1) or Ph2Sn(S2CNMe2)Cl (2) with sodium dimethyldithiocarbamate, in a 1:1 molar ratio, in CH2Cl2. Multinuclear (1H, 13C and 119Sn) NMR spectroscopy and mass spectrometry were used to characterize the new complex. Single-crystal X-ray diffraction studies revealed a bidentate behaviour of the dithiocarbamato ligand and a monodentate coordination of the NCS moiety through its nitrogen atom, thus resulting in a pentacoordinated C2SnS2N core. A 3D supramolecular network built through weak intermolecular S∙∙∙S and S∙∙∙H interactions was evidenced in the crystal of 3.

The heteroleptic mercury(II) complex [HgCl{SeC 6 H 4 (CH 2 NMe 2)-2}] (1) was prepared by reacting the corresponding lithium organoselenolate in an equimolar ratio with HgCl 2. The complex [Hg(SCN){SeC 6 H 4 (CH 2 NMe 2)-2}] (2) was prepared by the salt metathesis reaction between 1 and KSCN in a 1:1 molar ratio. The metal complexes were characterized in solution by multinuclear NMR spectroscopy and mass spectrometry and the solid state structure of 1 was determined by single crystal X-ray diffraction. In the crystal of 1 a 1D zigzag polymeric chain was formed by Se•••Hg secondary interactions.